Foreign Matter

Foreign Matter is a science fiction themed arcade game for the Apple II.

The player controls a small ship, which can move horizontally on the bottom of the screen and fire vertically. On each stage, a number of strange blob-shaped enemy vessels move about randomly on the screen attempting to strike the player. Enemy blobs can wander off the top of the screen and destroy the player by touching them from behind. If the player shoots all enemies, they advance to the next stage which is identical to the previous. The player has a total of 3 lives, and when all are lost, it's game over.